18 September 2009
Chop marks on hundred dollar bills
Chop marks are familiar to collectors of Chinese stamps as a cancellation/validation device. They are now appearing on high-denomination currency, and apparently around the world rather than just in China.
I don't quite understand how it validates the authenticity of the bill. If I were a counterfeiter with the ability to produce reasonable hundred-dollar bills, the addition of a counterfeit chop mark would be a piece of cake.
But they are interesting. I've just checked all my hundred-dollar bills and haven't seen any. :.)
More pix at this numismatic site, via Reddit.